Muffler for gas or gasoline engines.



PATENTED JAN 2 SHEETS-$112111 1.

J. F. KURTIS & H. E. MILLER.

APPLICATION FILED JULY 21, 1902.

MUFFLER FOR GAS 0R GASOLENE ENGINES.

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m: Nonms PETERS cc. PH01 O-LlTHO-, wmmusrom o. c.

H0 MODEL.

No. 718,131. PATENTED JAN. 13, 1903. J. F. KURTIS 3 H. F. MILLER.MUFFLER FOR GAS 0R GASOLENE ENGINES.

APPLICATION FILED JULY 21, 1902.

2 SHEETS-SHEET 2.

10 MODEL.

"m5 Mains PETERS 60., Pnorauma. w/snmmom o. c.

UNITED STATES PATENT OFFICE.

JOSEPH F. KURTIS, OF SPRINGFIELD, AND HERMAN F. MILLER, OF DAYTON, OHIO,ASSIGNORS TO GEORGE J. IHRIG AND ERNEST O. IHRIG, OF SPRING FIELD, OHIO.

MUFFLER FOR GAS OR GASOLENE ENGINES.

$PECIFICATION formingpart of Letters Patent No. 718,131, dated January13, 1903. Application filed July 21, 1902. Serial No. 116,329. (Nomodel.)

T all whom, it 727/(by concern.-

Be it known that we, JOSEPH F. KURTIS, residing at Springfield, in thecounty of Clark, and HERMAN F. MILLER, residing at Dayton,

in the county of Montgomery, State of Ohio, citizens of the UnitedStates, have invented certain new and useful Improvements in Muffiersfor Gas or Gasolene Engines, of which the following is a specification,reference being had therein to the accompanying drawings.

This invention relates to mufflers for gas and gasolene engines or forengines of the same general type known as explosive orinternal-combustion engines, although the device is also capable of usein connection with steam-engines or the like.

The invention has for its object to do away with the noise of theexhaust and to render the operation of the engine noiseless in so far asthis feature is concerned.

To this end our invention consists in certain novel features, which wewill now proceed to describe, and will then particularly point out inthe claims.

In the accompanying drawings, Figure 1 is an elevation of a mui'iierembodying our invention in one form. Fig. 2 is a vertical centralsectional view of the same. Fig. 3 is a transverse sectional view takenon the line x at of Fig. 2 and looking in the direction of the arrows.Fig. a is a transverse sectional View taken on the line (1 y of Fig. 2and looking in the direction of the arrows. Fig. 5 is 5 a sectional viewtaken on the line 22 of Fig. 2 and looking in the direction of thearrows, and Fig. 6 is a detail sectional view taken on the line a a" ofFig. 2 and looking in the direction of the arrows.

40 In the said drawings, 1 indicates the exhaust-pipe, which is providedwith a checkvalve 2, which opens freely to the exhaust, but prevents anyreflux of the pressure towardtheengine. Tothisexhaust-pipeisconnectedthe muffler (indicated as a whole by the reference-numeral 3) andcomprising a receiving-head 4-, an intermediate body portion 5, adischarge-head 6, and an outlet or exhaust head 7. The receiving-head 4:consists of acup-shaped or bowl-like portion 8, having a threadedreceiving-mouth 9, by means of which it is connected to the end of theexhaustpipe 1. Beyond this receiving-mouth the part 8 increases indiameter, its larger end being provided with a seat 10 to receive aplate 11, which closes the larger end of the cup or bowl and which isprovided with a conical boss 12, extending into the same and having athreaded aperture 13. In this threaded aperture tits thecorrespondingly-threaded stem 6o 14 of the inlet-regulating cone 15,which extends down into the contracted mouth of the receiving-head andserves by its adjustment to regulate the inlet-opening of the muffler,while at the same timeits conical shape serves to deflect theexhaust-gases outward, as indicated by the arrows. To render theregulation more effective, the broader end of the cone 15 is providedwith a flange 15, having notches 15 while the bowl 8 is provided with acooperating shoulder or seat 8 The space within the receiving-head 4:between the bowl 8 andboss 12 is occupied by a series of diaphragms 16,constituting baffleplates. Any desired number of these diaphragms orbaffle-plates may be employed, and in the present instance we have shownfour such plates, each extending from the part 8 to the part 12 andclosing the passage between the same, except as hereinafter indicated.Each plate is provided at either its inner or outer margin with anopening 17, formed by cutting away the material of the plate and openingup the cut-away portion, as indicated at 18, to form a deflector-plate,standing immediately adjacent to the opening 18 and at right angles tothe body of the baffle-plate. These openings 18 are located alternatelyat the outer and inner margins of the successive plates, so that theexhaust- '0 gases passing through the openings near the outer marginsmust then pass between the baffle-plates to the openings in the innermargin of the next plate. It will be observed that each deflector-platestands on that side of its opening toward which the. gases must move toreach the opening in the next plate, and said deflector-plates arepreferably of stance.

such size as to extend from one plate to the next, as shown. In this waythe gases after being caused to diverge outwardly by the regulating-coneare caused successively to pass toward the inner and outer walls of thereceiving-head, the deflector-plate serving to divert them from a directcourse from one set of apertures to the nearest apertures of the nextdiaphragm, so as to cause a circulation through all the parts of eachspace between any two successive baffle plates or diaphragms.

The discharge-head 6 is similar in construction to the receiving-head,but reversely arranged. It consists of a cup-like or bowl-like bodyportion 19, having its larger end closed by a plate 20, having a conicalboss 21 extending into the interior of the cup or bowl, said cup or bowlbeing provided with an outlet-opening 22 in its smaller end. The spacebetween the conical boss and bowl is filled by diaphragms 23, of whichany desired number may be employed, they being provided alternately ontheir inner and outer margins with openings 24 and deflecting-plates 25,formed by bending up the part of the dia phragm cut away to form theopening.

The receiving and discharge heads are connected by bolts 26 and arespaced apart by a cylindrical casing 27, which fits at one end in theseat 10 of the bowl 8 and at the other end in a corresponding seat 28 inthe bowl 19. Within this casing the receiving and discharge heads areconnected by means of pipes 29, of which any desired number may beemployed, three being shown in the present in- The plate 11 is providedwith apertures 30, surrounded by collars 31, while the plate is providedwith corresponding apertures 32, surrounded by collars 33. Each pipe 29is preferably made in two sections, havinginterposed between theirmeeting ends a diaphragm 34, having a plurality of relatively smallapertures 35, as shown more particularly in Figs. 2 and 3. Thesediaphragms are held between the meeting ends of the pipe-sections, whichare clamped together by the bolts 26, the ends of the pipe-sectionsfitting in the collars 31 and 33, respectively. In order to form aproper union between the pipes, one section may be provided with anenlarged mouth or bowl 36, into which the end of the other section fits,as shown in Fig. 2.

It will be seen that the exhaust-gases after passing through thereceiving-head are conducted by the pipes 29 to the discharge-head,passing through the apertured diaphragms 34 on their way, and in passingthrough the discharge-head the gases are again deflected first inwardand outward and caused to circulate thoroughly through the spacesbetween the baffle-plates by reason of the construction of saidbaffie-plates, the location of their openings, and the location of thedeflecting-plates.

The outlet-opening 27 of the dischargehead communicates with theoutlet-head 7,

which comprises a body portion or wall 37, preferably circular incross-section and of outwardly-increasing diameter. Internally it isprovided with a cup-shaped apertured diaphragm 38 immediately adjacentto the outlet-mouth 27 of the discharge-head, and the diaphragm orbaflie-plate 23 within said discharge-head nearest to said outlet isprovided with a central discharge-opening 39. (Shown more particularlyin Fig. 6.) Outwardly from the cup-shaped perforated diaphragm 38 theoutlet-head is provided with diaphragms 40 and 41, the former of whichhas a central opening 42, while the latter is provided with marginalopenings 43 and deflecting-plates 44. Outwardly from the diaphragm ,41there is provided acup-shaped diaphragm 45, having marginal serrations46, forming in conjunction with the body 37 spaces adjacent to the outerwall of the outlet-head, through which the products must pass. Stilloutwardly beyond the diaphragm 45 is located an aperturedplate 47, ofless diameter than the body 37 of the outlet-head, so that the escapinggases may pass not only through said plate 47, but also around themargins thereof. These several parts are held in position by a threadedrod 48, mounted in the conical boss 21 and extending outward through theoutlet head, the several diaphragms 38, 40, 41, 45, and 47 being mountedon said threaded rod, which latter is provided with a nut 49, whichholds the several diaphragms in place and also holds the conical body 37in place by'reason of the pressure of the margins of the diaphragms onthe inner wall of said body. The threaded rod 48 carries at its outerend an exhaust-regulating cap or closure 50, having a central threadedsocket 51 to receive the end of the rod and having outlet-apertures 52,grouped around said central socket. The cap or closure is provided witha flange 53, extending into the body of the outlet-head and havingoutletapertures 54 therein, which may be closed to a greater or lessextent, or entirely by turning the cap upon the threaded rod, so as tocause the body of the outlet-head to extend over said apertures to agreater or less eX- tent. The exhaust-gases after passing from thedischarge-head are further deflected and subdivided in their passagethrough the outlet-head, so that their final escape through theapertures 52 and if desired or necessary also through the apertures 53is noiseless.

It will be observed that we have provided a muffler having means forregulating the admission of the exhaust-gases and also means forregulating the escape of said gases after passing through the muffler,so that by a proper adjustment of these regulating devices the mufflermay be caused to operate successfully under varying conditions. By

reason of the retardation and subdivision of the exhaust-gases in theirpassage through the muffler their final exit is practically noiseless,while at the same time the structure is IIO such that no back pressureis exerted upon the engine. The entire structure is so organized that itmay be readily taken apart and as readily assembled for purposes ofinspection and repair.

We do not wish to be understood as limiting ourselves strictly to theprecise details of construction hereinbefore described, and shown in theaccompanying drawings, as it is obvious that these details may bemodified without departing from the principle of our invention.

Having thus fully described ourinvention, what we claim as new, anddesire to secure by Letters Patent, is-

1. A muffler comprising a receiving-head adapted to be connected withthe exhaustpipe and provided with internal baffle-plates and with meansfor regulating the admission of the exhaust-gases, a discharge-head alsoprovided with internal baffle-plates, a plurality of pipes connectingthe receiving and discharge heads, and means for regulating the escapeof the exhaust-gases after passing through the discharge-head,substantially as described.

2. A muffler comprising a receiving-head adapted to be connected withthe exhaustpipe and provided with internal baliie-plates and with meansfor regulating the admission of the exhaust-gases, a discharge-head alsoprovided with internal baffle-plates, a plurality of pipes connectingthe receiving and discharge heads, each pipe being provided with aperforated diaphragm, and means for regulating the escape of theexhaust-gases after passing through the discharge-head, substantially asdescribed.

3. A mufliler comprising a receiving-head adapted to be connected withthe exhaustpipe and provided with internal baffle-plates and with meansfor regulating the admission of the exhaust-gases, a discharge-head alsoprovided with internal baffle-plates, a plurality of pipes connectingthe receiving and discharge heads, and an outlet or exhaust headconnected with the outlet of the discharge-head, provided with internalbaffleplates and having an adjustable cap or closure to regulate thefinal escape of the exhaust-gases, substantially as described.

4. In a muffler, a head comprising a bowlshaped body having relativelylarge and small openings at its opposite ends, a plate closing the outerend having openings and a central conical boss extending into the bowl,and annular baflie-plates fitting atintervals between the boss and bowland provided alternately at their inner and outer margins with cutawayportions, and upstanding deflectingplates adjacent to the margins of theopenings toward which the gases move, substantially as described.

5 In a muiiier, the combination, with a receiving-head having abowl-shaped body and an apertured cover with a central boss andseparated diaphragms having openings at their alternate margins andadjacent deflecting-plates, of a conical regulating and deflecting coneadjustably mounted in the inlet-opening of the receiving-head, a similarreverselyarranged discharge-head provided with similar baffie-plates,pipes connecting the receiving and discharge heads and provided withapertured diaphragms, an outlet or exhaust head connected with theoutlet-opening of the discharge-head and provided with internalbaffie-plates, and an adj nstable cover or closure for thedischarge-mouth of the exhaust-head to regulate the outlet thereof,substantially as described.

In testimony whereof we affix our signatures in presence of twowitnesses.

JOSEPH F. KURTIS. HERMAN F. MILLER.

Witnesses to signature of Kurtis:

E. O. HAGAN, IRVINE MILLER.

Witnesses to signature of Miller:

G. A. WIKE, ERWIN SoHwARz.

